Composition for the manufacture of conduits and the like



106. COMPOSITIONS,

COATING OR PLASTIC.

' Patented 1931 UNITED STATES fxamtt PATENT OFFICE CARROLL D. RYDER, OF DANIBUB-Y, OONNECTICU '1 OOMZPOSITION FOR THE MANUFACT No Drawing.

and structure by reason of such increased fi 1 strength. The present application is a continuation in part of my application for conduit, Ser. No. 162,415, filed January 20, 1927.

Heretofore commercial concrete consisted, of sand, glravel and cement, w ecause of the irregu ar s1ze an shape of the gravel, its

smooth surface, and the granular nature of UBE 0F CONDUITS AND THE LIKE Application filed January 25, 1928. Serial No. 249,497.

loading to the point of failure or breakage are enlirel trans-fra mentary, as distinglus i. edffromiiblmei l p y- 9a ave an sanilassigfie, in which P holes of the aggregate partially pull out of 5 the bed upon fracture. '7

In carrying out my invention I egate of coarse limeston and l ,ul im- 1n aou equa rol W1 cement the proportion'o th limestone aggrega othe cement being about three'td-one. This -mi-xture is poured in a semi-we 5 a't'e or what'is known in the industry as a d" "LJE-n and may ,to 's'uitablefpipemolds, be tapped or"not, depending upon the particular requirements. The peculiarly the sand, produced a relatively porous, nontenacious and homogeneous nature of the homogeneous mixture which depended for 1 its strength upon bulk, rather than upon its 20 inherent structure. According to the present invention it is proposed to provide a composition ofra substantially non-porous, homogeneous nature, in which substances are employed having both a structural and natural aflinity for each other, resulting in a solid tenacious mass. A further object isto producea composition of uniform structure by providing ingredients that may be processed and graded to render them uniform, as distinguished from sand and avel, which vary in structure and size in di erent localities.

J To this end I propose to provide a composition composed of cement and liifimnugi g fgjfigtgg censisuhg o relatively cnmelimcstqne pa ii ilesaml r lat vel -finelxground limestone. 1 am awarethat'compositions have heretofore' been "produced in which cinders,both co'a rse and fine; have been employed as an aggregate, but these" were porous and had a relatively lower crushing and breaking strength than concrete employing gravel and sand aggregate, and were therefore entirely unsuitable for uses requiring strength and non-porosity, such as in conduits and sewers. Also, I am aware that limestone has heretofore been employed in concrete c ate.-Eatenac pi y neo M Fructuraoim .QQmp0sition is characterized 1Wth M. at frac ompositions in combination with a M "compb'sitib'ifisfiuch that the molds-may be almost immediately-removed after pouring, and the pipe moved to an airingroom, withoutdanger of breakage or fracture, thereby permitting the'lrepeated use of the molds during airing of the pipe. ".[rrthe'airing room it is 4 ed and allowed to dry an at the coarse 7 llmest'o'iii'e garment an 'Q'Fdiiii'c'f limestone, J z" I ity, the elng rawn into a ll of n. s"of'tli'"coarse par W: Les, t'i-e I: rely comhiningw 1 an or therew 1mm elzit Ive nonoros lihllmogeneeuss. Cm I :u-ng nonporous, is particularly suited to the stresses and strains set up in pipe structures, this being due in part to the peculiarly tenacious and homogeneous composition, and in part to the irregular shape of the coarse limestone particles, which in the combined mass present an infinite number of closely related and interlocked strains resisting areas extending in all directions.

For this reason it is ossibl non-remforced 1e w1 my compositlon,

v M usual mxeland saiid a ate, an w I ch will have the add- Ed advan? e of decreased weight and wall thickness. fit will be understood of course,

that the invention is not limited to the production of non-reinforced pipe.

While approximately the relative proportions herein set forth are preferably employed I under ordinary conditions and circumstances, suitable variations may be made in the proportions, according to the nature of the work and the circumstances under which it is constructed. I therefore do not limit myself to the precise pro ortions herein set forth, but preserve the rig t to all such variations and proportions as properly fall within the spirit and S00 e of my invention.

Having thus described my invention, what claim, and desire to secure by Letters Patent 1. A fluid carrying molded conduit, composed of a pouring composition comprising a mixture composed wholly of a sand-free aggregate of coarsely broken limestone particles having rough uneven surfaces and fine limestone particles of powdery consistency having a structural and natural affinity for said coarse particles, cement, and water acting as a mixing agent, said powdered limestone adapted to enter into solid, homogeneous interlocked relation with the rough uneven surface of the coarse limestone particles, whereby a non-porous conduit is produced so in which fracture will be trans-fragmentary as res ects said coarse limestone particles.

2. 1E fluid carrying molded conduit, composed of a pouring composition comprising a mixture composed wholly of a sand-free aggregate of coarsely broken limestone particles having rough uneven surfaces and fine limestone particles of powdery consistency having a structural and natural afiinity for said coarse particles, said coarse and fine limestone bemg in substantially equal proportions, cement in substantially the proportion of one to three to said limestone, and water acting as a mixing agent, said powdered limestone adapted to enter into sohd, homogeneous interlocked relation with the rough uneven surface of the coarse limestone particles, where by a non-porous conduit is produced in which fracture will be trans-fragmentary as respects said coarse limestone particles.

Signed at Bridgeport, in the county of Fairfield, and State of Connecticut, this 22nd day of December, 1927.

v CARROLL D. RYDER. 

